Does anyone know anything about the LC Engineering big bore throttle body? I bought the header for my 86 4runner and I love it I am thinking about getting a big bore throttle body as well but I wanted to look into it a little first. Thanks!

 

I bought all the parts to swap in a later model upper plenum (intake manifold) and throttle body for $100. I would try this route first:

http://siestaoffroad.com/tbody.html

 

Interesting...

 

I dont have one but my friend bought the header first to see the performance difference between the two, the header helped alot but the throttle body wasnt to much for the money there was a litlle better response at the gas though. I learned that a better upgrade is to do a clutch fan eliminator and go with the electric fan and go with a different pulley it was one of the best power upgrades I have. I hope this helps out. let me know what you think if you decide to go that route.

 

did you feel a major power difference with the clutch fan eliminated? I have been thinknig about this mod for years.

 

Ohh yea no question I am for damn sure gonna go with an electric fan without question. I was just wonder after me buying a K&N air filter, header, electric fan, and tune up what would be the next best upgrade for HP and gas mileage

 

The problem is, overall, it saves very little. The purpose of the fan clutch is to let the fan freewheel when it's not needed and progressively lock up when it is- the more it's needed the more power it requires. The biggest advantage to electric fan over belt-driven is being able to turn it off during water crossings.

An electric fan requires power to operate and it gets that from where? ...the battery.
but the battery needs recharged and gets the charge from where? ... the alternator.
and the alternator needs power to generate electricity and gets the power from where? ... the engine.
... which is where the power to turn the fan came from in the first place.
You're just transfering the engine load from the fan / clutch assembly to the alternator.

I had an electric fan on my 91 and when it kicked in, I could feel the draw on the engine- needed to give it more gas. Overall, didn't increase my mpg for the 6 months it was installed... and ended up going back to the mech fan because the engine ran hotter with the electric fan, or rather didn't run a consistent temp, so it was throwing the NOx readings off at the emissions test.

 

well, when I said the fan does give you power I did notice a considerable difference in in power, I also did go with a different pulley I cant remember the diameter off the top of my head, but it was (lc engineering) I also have a better battery and a bigger alternator, which will help with the power draw. As we all know when ever we upgrade anything its going to take 2 or 3 other thngs to see the full potential of the original upgrade, and lets face it the 22re or 22r are the greatest motors for power delivery. 'm seriously considering the 7m swap over any of them but so far wth fabbing that up it looks like 5 to 6k venture but your also staying wth the yota motor and about 300hp and 380 trq.

 

I installed the LC/+3mm TB on my '85 about 10 years ago. I needed a new TB at the time and that fit the bill at the time. Major thing I noticed is that with the added air flow, I found I had a 2000-3000 ft. increase in elevation before I really noticed engine power dropping off. Used to happen at ~4000' with the stock TB and now it is 6000'-7000' before I notice the same drop off. Below 4000', not a lot of difference that I can feel, by the vacuum gauge, both the stock and oversized TB will drop the vacuum to 0" at WOT, so that is about as good as you can expect:
- http://www.4crawler.com/4x4/CheapTri...ds/index.shtml